body {
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    margin: 0 auto;
    /* background-color: #ccc; */
    /* height: 3000px; */
}

.app ul {
    padding: 0;
    margin: 0;
    background-color: #232326;
    height: 45px;
    list-style: none;
}

.app ul li {
    height: 45px;
    float: left;
    text-align: center;
    line-height: 45px;
    color: white;
}

.app ul li:nth-child(1) {
    width: 8%;
}

.app ul li:nth-child(2) {
    width: 10%;
    font-size: 0;
}

.app ul li:nth-child(3) {
    width: 57%;
}

.app ul li:nth-child(4) {
    width: 25%;
    background-color: #cd2525;
}

.app ul li:nth-child(1) img {
    width: 16px;
    vertical-align: middle;
}

.app ul li:nth-child(2) img {
    width: 35px;
    vertical-align: middle;
}

.search {
    position: fixed;
    overflow: hidden;
    height: 44px;
    min-width: 320px;
    max-width: 640px;
    width: 100%;
}

.search-left {
    position: absolute;
    width: 40px;
    height: 44px;
    top: 0;
    left: 0;
    /* background-color: pink; */
}

.search-right {
    position: absolute;
    width: 40px;
    height: 44px;
    top: 0;
    right: 0;
    /* background-color: blue; */
    color: white;
    line-height: 44px;
}

.search-center {
    position: relative;
    height: 30px;
    background-color: #fff;
    margin: 0 50px;
    border-radius: 15px;
    margin-top: 7px;
}

.search-left::before {
    content: "";
    display: block;
    width: 20px;
    height: 18px;
    /* background-color: black; */
    background: url(../img/3.png)no-repeat;
    background-size: 20px 18px;
    margin: 12px 0 0 12px;
}

.search-center-logo {
    position: absolute;
    width: 20px;
    height: 15px;
    background-color: #000;
    top: 7.5px;
    left: 15px;
    background: url(../img/4.png)no-repeat;
    background-size: 20px 15px;
}

.search-center-logo::before {
    content: "";
    display: block;
    width: 1px;
    height: 15px;
    background-color: #ccc;
    margin-left: 30px;
}

.search-center-magnifier {
    position: absolute;
    width: 14px;
    height: 14px;
    background: url(../img/jd-sprites.png)no-repeat -83px 0;
    background-size: 200px auto;
    top: 9px;
    left: 56px;
}

.search-center>input {
    position: absolute;
    border: none;
    left: 80px;
    top: 6px;
}

.picture>img {
    width: 100%;
}

.Jump-to-picture div {
    float: left;
    width: 33.33%;
}

.Jump-to-picture div a img {
    width: 100%;
}

img {
    vertical-align: middle;
}

.Jump-to-picture {
    overflow: hidden;
    border-radius: 15px 15px 0 0;
}

.nav a {
    float: left;
    width: 20%;
    text-align: center;
    margin-top: 10px;
}

a {
    font-size: 8px;
    text-decoration: none;
    color: #000;
}

.nav a img {
    height: 40px;
    width: 40px;
}

.nav a span {
    display: block;
    margin-top: 5px;
}

.Jump-to-picture2 a {
    box-sizing: border-box;
    float: left;
}

.Jump-to-picture2 a img {
    width: 100%;
}

.Jump-to-picture2 a:nth-child(1) {
    width: 50%;
}

.Jump-to-picture2 a:nth-child(2) {
    width: 25%;
}

.Jump-to-picture2 a:nth-child(3) {
    width: 25%;
}

.Jump-to-picture2 a:nth-child(n+2) {
    border-left: 1px solid #ccc;
}

.nav a:nth-child(n+6) {
    margin-bottom: 10px;
}